Several of the words provided in the article are extremely rare, one of them appearing only twice in the written record, and by the same author (per the OED). However, some of the examples were at one time fairly well-known words which have simply crept into obsolescence. Still others may not have been used a great deal, but their derivations are interesting, nonetheless.
|Roots from https://www.treesisters.org/news/62/81/A-Soil-Story|
|Bladderwrack from http://bit.ly/1bHvO5K|
|Silk from http://www.wildfibres.co.uk/html/silk.html|
Silk, by the way, is a word that came from the Orient. The Germanic languages that have similar forms of this word appear to have gotten them from one of the Slavic languages of the Baltic Sea region. The Slavic and Germanic forms all share the letter l. However, the Latin and Greek forms have an r instead of an l (Latin for silk is sericum), and that form gave rise to the name that the Greeks bestowed upon the first silk traders - Seres. It is thought that the difference between the l-form and the r-form is the result of two slightly different source words.
Now, after all that, I hope you agree that we have helped justify the title of the article that inspired this blog entry!